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<td class="sectionTableSingleCell"><a class="elementLinkWithUserText" href="./../../../rup/guidances/termdefinitions/uml_EE52195D.html" guid="_yZZbhtnmEdmO6L4XMImrsA"><img border="0" src="./../../../rup/customcategories/resources/uml.gif" alt="UML 图标" width="13" height="16" /></a> 对一组对象的描述，这些对象具有相同的<i><a class="elementLinkWithUserText" href="./../../../rup/guidances/termdefinitions/attribute_8582E14B.html" guid="_x7vPJtnmEdmO6L4XMImrsA">属性</a>、<a class="elementLinkWithUserText" href="./../../../rup/guidances/termdefinitions/operation_A1EEE7AB.html" guid="_yPQoFtnmEdmO6L4XMImrsA">操作</a>、<a class="elementLinkWithUserText" href="./../../../rup/guidances/termdefinitions/method_F8F03EBD.html" guid="_yNUuY9nmEdmO6L4XMImrsA">方法</a>、<a class="elementLinkWithUserText" href="./../../../rup/guidances/termdefinitions/relationship_70ECBD47.html" guid="_yTIbcNnmEdmO6L4XMImrsA">关系</a></i>和语义。类可使用一组接口来指定它提供给其环境的操作集合。请参阅：<i><a class="elementLink" href="./../../../rup/guidances/termdefinitions/interface_875737E.html" guid="_yLPDudnmEdmO6L4XMImrsA">接口（interface）</a></i>。</td>
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